5. Lightly mark the fold lines with a pencil and then use a bonefolder or the wrong side of a butter knife. Then score the FOLD lines * Fold the envelope * as shown on the template.
Scoring a piece adds a notch to the paper that makes it easier to fold. Place the ruler on the fold line and take the bonefolder and run it along the length of the fold. If you do not have a bone folder you can use the back side (the un-serrated edge) of a butter knife. Do not press too hard as you do not want to rip or tear the paper.